dhclient bug

[Tobias Roth]

from man 8 dhclient:

       The  -1  flag  cause dhclient to try once to get a lease.  If it
       fails, dhclient exits with exit code two.

with a missing dhcpserver or non-existent interface, this works.
however, it does not when i unplug the ethernet cable. in that case, i get
back true after the timeout, not 2.

can someone verify this? is it a bug that must be fixed from the freebsd
side or should a bug report to the isc-dhcp people?